2001. 6.22
Total:250
1.Definition and Explanation
a.Write down the full name for the VSEPR model, and give the explanation
(5%)
b.Explain the difference between electronegativity and electron affinity
(5%)
c.Explain molecularity and termolecular reaction (5%)
d.d1.Critical point and triplet point
d2.Lysis and crenation
d3.Tyndall effect (10%)
e.n-type and p-type of semiconductors.(5%) What type of semiconductor would
be formed if a small amount of Selenium impurity were added to pure
Arsenic? (5%)
f.Explain the differences between Schottky and Frenkel defects (5%)
g.Give an explanation why ΔSsol0 (entropy of solution) for benzene in water
is negative (-58 J/K) (5%)
h.Ideal solution and Raoult's law (5%)
i.Define hydrophobic and hydrophilic (5%)
j.Why are CN- and CO toxic to humans? (5%)
k.Define enantiomers (5%)
l.Define the lanthanide contraction (5%)
m.Define two types of cell:prokaryotes and eukaryotes (5%)
n.Give the definition and the biological function of the following
termologies: (10%)
n1.Mitochondrion
n2.Lyosome
n3.Ribosome
o.Briefly explain why glucose has to be stored in a form of polymers like
starch rather than the monomers (5%)
2.Assume that NO has similar MO diagram with O2. For species NO, NO+, NO- and
NO2- (10%)
a.Write down the MO diagram for NO
b.Ordering the bond energy in terms of bond order for the above species
c.Which have(has) paramagnetic property?
3.In general, what types of information can rotational, vibrational and
electronic spectroscopy provide? Predict their order of energy in terms of
wavelengths(i.e.UV-Vis, X-ray, IR...etc) (10%)
4.The Arrhenius equation for the reaction rate can be generally expressed as
k = zpe^(-Ea/RT). Please explain the definition of z, p and Ea. (10%)
5.The decomposition of many substances on the surface of a heterogeneous
catalyst shows the following behavior:Give the order of the reaction rate in
A-B and B-C regions.(5%) How do you account for change of the rate from A
to C? (5%)
Rate
│
│ B ______________C
│ ╱
│A ╱
│╱
└───────────
Concentration of reactant
6.For a cubic packing spheres are stacked on top of each other in successive
volume occupied by spheres in the unit cell
layers. Define fv = ──────────────────────
volume of the unit cell
prove fv=52.4% for a cubic packing (10%)
7.The following mechanism(molecularity) has been proposed to account for the
rate law of the decomposition of ozone to O2(g):
k1
O3 + M ←→ O2 + O + M
k-1
k2
O + O3 ─→ 2O2
Apply the steady-state hypothesis to the concentration of atomic oxygen, and
derive the rate law for the decomposition of ozone. (M stands for an atom
or molecule that can exchange kinetic energy with the particles undergoing
the chemical reaction.) (10%)
8.Calculate the molar solubility(molarity) of O2 in water at 25度C and a
partial pressure of 160 Torr. The Henry's law constant for O2 in water is
3.30×10^7 Torr/mol. Note for the Henry law P =kH*x where kH is the Henry's
law constant and x represents the mole fraction of the dissolved gas (10%)
9.To determine the molar mass of certain protein, 1×10^-3g ofthe protein was
dissolved in enough water to make 1.00mL of solution. The osmotic pressure
of this solution was found to be 1.12torr at 25度C. Calculate the molar
mass of the protein (10%)
10.Give formulas for the following complex ions (10%)
a.pentaammineiodochromium(III) iodide
b.tetraaminedichloroplatinum(IV) tetrachloroplatinate(II)
c.iodopentakispydineplatinum(IV) ion
d.trisethylenediaminecopper(II) bromide
11.Write down the MO energy-level diagram for CoF6 3-, which yields the high
spin case, and for Co(NH3)6 3+, which results in the low-spin case (10%)
12.What is the biological function of a.cytochromes, b.myoglobin and c.
hemoglobin? Are they saccharides, nucleic acids, protein or lipids? (10%)
13.Describe the mechanism of permanent wave of the hair(燙髮) (10%)
14.Give the structure of triple-hydrogen-bond base pair in DNA (10%)
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作者: abacada (放眼2006) 看板: NTU-Exam
標題: [試題] 90年下 周必泰 普通化學甲下期末考partB
時間: Mon Jul 18 15:39:46 2005
(接A)
選擇題(3%*10=30%)
1.The reaction of A forming C is found to be through the intermediate B.
Which of the following conditions where [B] can be treated via a
steady-state approach? k1 k2
A ←→ B → C
k-1
(a)k-1 >> k1 (b)k-1 + k2 >> k1 (c)K1 + k2 >> k-1 (d)k2 >> k-1
(e)k2 >> k1 (f)k1 + k-1 >> k2 (g)none of above
(多選題)
2.Estimate typical hydrogen bonding energy
(a)<1 kcal/mol (b)3-10 kcal/mol (c)15-20 kcal/mol (d)>20 kcal/mol
(e)1-3 kcal/mol
3.For a given volume, which of the following shapes has the smallest surface
(a)cube (b)tetrahedron (c)pyramid (d)octahedral (e)sphere
4.Which method may generally decrease the conductivity of a semiconductor
(a)decreasing the temperature (b)adding an impurity
(c)irradiating with (d)decreasing the energy gap (e)none of tghe answers
5.What type of carbohydrates that human stores the energy in?
(a)fructose (b)sucrose (c)cellulose (d)starch (e)glycogen
6.Which of the following compound does not exhibit visible color?
(a)Cu(NH3)4Cl2 (b)[Sc(NH3)6]Cl3 (c)[Co(NH3)6]Cl3 (d)[Fe(H2O)6]Cl2
(e)[Cr(H2O)6]Cl3
7.Which of the following amino acids is not optical active?
(a)Cysteine(C3H7NO2S) (b)Alanine(C3H7NO2) (c)Valine(C5H11NO2)
(d)Glycine(C2H5NO2) (e)none of above
8.Based on the phase diagram shown below, which statements are correct?
Pressure
↑ B
│ ‧ C
│A ╲E ‧
│‧ ‧╯
│ ─╯ D
│ ──╯‧F ‧
└────────→ Temperature
1.Sublimation occurs at a point in the transformation along a straight line
from point A to point F.
2.C and E represent points where the gas and liquid phases are in
equilibrium.
3.ΔHvap can be measured at point B.
4.Molecules at point D have a greater average kinetic energy than those at
point F.
5.The temperature at point E is called the critical temperature of the
compound.
(a)2,5 (b)1,3,4 (c)1,2,3 (d)2,4,5 (e)1,2,4
9.A certain complax ion has a distorted octahedral strusture in which the
ligands along the positive and negative z axes are compressed (pushed in
closer to the central metal ion). What is the d orbital splitting diagram
for this complex ion?
(a) ── (b) ── (c)── ── (d)── ── ──
dz2 dx2-y2 dxz dyz dxy dxz dyz
── ── ── ── ──
dx2-y2 dz2 dxy dz2 dx2-dy2
── ── ── ──
dxz dyz dxy dz2
── ── ── ──
dxy dxz dyz dx2-y2
(e)── ──
dxz dyz
──
dxy
──
dz2
──
dx2-y2
10.Which of the following are structural isomers?
i)coordination isomers,ii)linkage isomers,iii)geometric isomers,
iv)optical isomers
(a)i,iii (b)ii,iv (c)i,iii,iv (d)ii,iii (e)i,ii
P.S.老師會注明題目出處以表示均為上課範圍。